.tree-open,
.tree-close {
  display: inline-block;
  width:14px;
  height:14px;
  text-align: center;
  line-height: 13px;
  border: 1px solid #888888;
  border-radius: 2px;
  background: #FFFFFF;
}
.tree-open {
  line-height: 13px;
}
.tree-close:after {
  content: "+";
  font-style: normal;
}
.tree-open:after {
  content: "\2013";
  font-style: normal;
}


